Cultivator.



P. JOHNSON.

GULTIVATOR. APPLICATION FILED MAR. 22, 1909.

Patented Feb. 8, 1910.

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P. JOHNSON.

GULTIVATOR. APPLICATION FILED MAR. 22, 1909.

Patenelll Fb. 8, 1910.

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witnesses zen of theUnited PETER JOHNSON, F IRONWOOD, MICHIGAN.

CULTIVATOR.

To all 'whom it may concern.;

Be it known that I, PETER JOHNSON, a citi wood, in the county of Gogebic and State of Michigan, have invented certain new and useful Improvements in Cultivators, of which the followin is a specification.

M y invention re' ates to improvements in cultivators, and more particularly to an improved rotary cultivator or harrow, the object of the invention being to provide improved' mounting for rotary drums carry ing an improved arrangementof teeth adapt- -ed to effectually break the clods and finely divide the soi A further object is to provide animproved machine of this character, with improved vided with a means for adjusting or regulating the depth of cultivation.

With these and other objects in View,` the invention consists in of construction,- and rangements -of partsl hereinafter claims.

In theaccompanying isa plan view illustratin certain novel features combinations, and varas will be more fully drawings, Figure 1, my improvements.

Fig. '.2, is a view in section on the line 2-2' of Fig. 1. Fig. 3, is an enlarged view in cross section of the forward drum. Figs. 4, 5, and 6, are detail perspective views of the different forms of `teeth employed `on the drums, and Figs. 7 `and 8, are views illustrating a modification.

1 `represents a horizontal ame, composed preferably of angle iron, and sup orted near its rear end upon an axle 2, the atter lbeing, mounted in traction wheels 3.

The forward end of the frame 1 is braced extension upon acaster wheel 5, and the device Vis to be drawn over the ground in any desired manner, and an operators seat 6 is supported on the rear cross bar 'ofthe frame.

On the und frame 1, and diametrically op osite to each ot er, are spring bars l'7, rigi ly secured to the frames at one end as shown', and having bearing sleeves 8 secured thereon, support` ing shafts 9 and 10 respectively, it being understood that there are two 4pairs of these spring supporting bars 7, located one behind t e other, so .as to su port'the shaft-s 9 and 10 in'parallel at the forward portion of the rame as clearly shown in Figs. 1 and 2. On

rectangular pro- 4, supported Specication of Letters Patent. Application iled March 22, 1909. Serial No. 485,020.

States, residing at Iron- Avery e described and pointed out in theyone side of the frame,

. exert downward er face of the side bars of these shafts 9 and 10, drums 11 and 12 respectively, are provided, and consistof a series of disks 13 secured rigidly to the shafts, and connected around their peripheries by longitudinal bars 141, there being. six bars 14- to cach drum, although I do not of course limit myself to any particular number. The forward drum 11 is provided with three different kindsof teeth as shown in detail in Figs..4, 5 and 6. As abovestated, there are six bars on the drums, and the teeth on the opposite bars are alike.` On two opposite bars, straight teeth 15 are secured as shown in Fig. 4; on two other ofsaidA bars,"

curved teeth 16, as shown in Fig. 5;.and on the' remaining two bars, angular Vteeth 17 as shown in Fig.. 6, are employed. The-said bars are preferably of angle iron, and all of the teeth are provided with perforated lugs 18 at .their inner ends to receive bolts 19, securely clamping the teeth on the bars. The an ular teeth 17 as shown in Fig. 6, are icacious in breaking clods of' dirt, while the curved teeth 16, shown in Fig. 5, and the straight teeth 15, shown in Fig. 4, will most thoroughly cut and pulverize the4 soil. The drum 12`is provided with teeth 15, such as shown in Fig. 4, on \all of its longitudinal bars to most eiectu lly pulverize the soil, not thoroughly cultivated by the forward drum 11.

The shafts 9 and 10 project outwardlyto and are provided with sprocket wheels 20 and 21 respective1y,icon nected by sprocket chainl 22. Another sprocket vwheel 23 on the shaft 10 is connected by a sprocket chain 24, with a drive sprocket 25, secured upon the axle. 2, so that as the machine is drawn over the ground, the revolving of the axle will rotate the drums through the medium of the sprocket wheels and sprocket chains above described:

' @oiled springs 26 are disposed between the free ends of spring bars 7 and frame 1, yand pressure on the spring bars f to hold the cultivator teeth to tlieir'work.

' Ashaft 27' is mounted in the rear portion' of the machine, and is provided with drums 28 connected by chains or other flexible connecting devices 29, with the free ends ot spring bars 7, and pass over pulleys 30 on the frame 1. This shaft 27 is turned by a hand lever 31, which may be locked at various adjustments to a notched segment 32, and it will be'observed that by manipulating this lever, the drums can be raised or lowered to regulate the depth of cultivation, or lifting't-hem entirely from engagement with the ground when the machine is to be transported from place to place. A-

Figs. T and 8 illustrate a modified con` struction of longitudinal cutter blades 33, having supporting brackets 34, adapted to be secured to the longitudinal bars of the drums 12, and the cutter blades 33 will take the place of the teeth on the rear drum.

Various slight changes might be made in the gene 'al form and arrangements of parts described wit-hout departing from my invention, and hence l do not restrict myself to the precise details set forth, but consider myself at liberty to make such changes and alterations as fairly fall within the spirit and rscope ot` the claims.

Having thus described my invention what l claim as new and desire to secure by 'Letters vPatent is:

1. .ln an apparatus ot' the character dcscribed, the combination with a trame, an axle supporting the frame, and traction wheels supporting the axle, ot' rearwardlyv and downwardly extendino spring bars se cured at their forward ent s to thel frame. a. shafthaving rotary support on said spring); bars, -harrow teetlranounted ou said' shaft, and means for adjusting said spring bars `"crtically whereby the dept-h ot cultivation may be regulated.

2. .'In al1-appa at-us of the character described, -the combination- With a frame, .an

axle supporting the t'raine, and traction wheels supporting the axle, of rearwardly and downwardly extending spring lbars secured at their forward ends to the frame,

coiled springs bearing' downwardly on the free-ends-o'f saidspring bars, a shaft having rotary'support on said spring bars, harrow7 teeth Imounted on said shaft. and means tor adjustino' said s ring bars vertically where by the fepth oli) cultivation by the haa-row teeth may be regulated. i

3. ln au apparatus of thc character described, the combination with a frame, an axle supporting the vt'ramc, and traction wheels supporting the axle, of spring' bars securedatone end to the frame, a .hatt having rotary support ou said spring bars, a drum on said shaft, teeth on said drum, and means for adjusting said spring bars vertically, whereby the depth of cultivation .by the teeth ou the drums maybe regulated.

4. ln an apparatus of the lcharacter de-' scribed. the combination with a frame, of spring bars secured at one. end to said frame, coiled springs bearing downward on .the free ends of said spring hars, drums having rotary support on said spring bars, lteeth on said drums. a shaft supported-on said frame, a lever to turn said shaft, pulleys ou the frame, and flexible connecting' devices between said shaft and the. free ends Iof said spring bars, whereby when said .shaft .is turned, lthe spring `bars will be anoved to adjust the drums vertically.

flu testimony whereof l have signed my name to this specification in the presence ot' @two subscribing witnesses.

.P-EIER falbllrlN SUN.

Witnesses CHESTER Gr.' Rooms, H. M. ERICKSON. 

